you did rename the downgrade file to PG05IMG? that will get you to S-off...then try to ignore the OTA trying to reupdate your phone and re rename that fil or add a 1 to the end of it.....then run the Revolutionary step by step video to get root...
scroll down this page to the video
I have tried several roms, BAMF IS WAY nice...liked it a lot, liquid is smooth...have.... tried lightening5.0, that runs well...now have electrics Rom running...that's a whole new look, like an iPhone look kinda to it